SSM Mask Respirator SR 100 P3 R KitSundstrm half face respirator, P3 reusable kit. Silicone half mask negative pressure respirator with excellent fit and very good breathing comfort. Two covered exhalation valves provide minimal breathing resistance, while the wide elastic head strap with large dished crown plate ensure a comfortable and safe fit. Mask body and pigment are approved by the FDA and BGA for foods to minimize the risk of contact allergies. Includes SR 510 low resistance